Die-head.



HfL. HSHER.

03E HEAD.

APPLICATIOH FILM EAR. 21, 191i.

Patented 0011.19, 1915.

use, all as will be nal section on the dotted line jects from one HENRY L. rIsnEn, or

MACHINE COMPANY,

DIE-HEAD.

Application filed and 21, 1911.

head, whereby such a head is provided closed by hand of which, while simple which may he opened and and the construction in design is yet rigid and very efficient in described and claimed.

Referring to the accompanyingdrawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a face view of a die-head of my improved form with one of the forecutters removed, Fig. 2 a central longitudi- 2-2 in Fig. 1, and Fig. 3 an edge View as seen when looking in the direction indicated by the arrows from the dotted line 3-3 in Fig. 1.

In said drawings the portions marked A. represent the 'body of the head, B the cutterbloclrs, or holders, and C the cutters.

The body A is a castingoit' appropriate form to carry and support the various parts composing the head, being formed with a central aperture (1 to clear the work in operation. It is also formed with a recess in the front r'ace around its periphery in which is mounted a ring A secured in position by a retaining ring a. ts rear end is formed with a flange a for attachment to the machine and an arm or flange A proside to afford a pivot hearing for the adjusting lever, as will he presently described. It is also formed withoperforations located equi-distant around its axis to ailord seats for the trunnions of the cutter-holders.

The cutter-blocks B are .of appropriate form mounted on trunnions B seated in the perforations provided therefor in the body A. Said trunnions are sccuredin position by flanged screws 72 inserted from the back side of the body into Specification of Letters Eatent.

have invented cer hereinafter more fully screw-threaded per Patented list. 12 2 19.7.5.

'selial Kc. sisesi; forations in the trunnions, the flanges of the screws bearing against appropriate seats insa d body. The blocks B are secured to the front end of said trunnions by screws 72, being thus adapted tG'OSGliliillG around the axis of said trunnions. Each cutterblock' is formed with a way in its back in which is mounted a sliding block 3 with a perforation in which a pin Z) projecting from the adjacent face of ring A is adapted to engage. Said ring A is formed with a projectingarm A on one side in which a pivot-block a is mounted by a pivot a (formed integral therewith and extending through a perforation in said arm A An adjusting lever 10, in the form of a bell-crank lever, ismounted at its angle on -'a' pivot 11 in the bracket A A screw 12 is hinged at 13 to the'short side of said lever and extends through a perforation in pivot-block a being adapted to slide freely therein, but held-"in an adjustedposi; tion by nuts 1e and 15 on each side of said pivot-block. A. screw 16 is mounted in a transverse perforation in the rear end in the base of screw to rest on a suitable seat provided on ring and thus limit the movement ct said lever so that the normal position of pivot 13 will be in line or slightly belowthe line of pivots 11 and a to secure closed position. on said screw to limit the adjustment.

in operation, it will be seen that by the manipulation of lever 10 through the'pivotal connection between ring A and blocks 13, said blocks may be rocked on their trunnions to open and close the die, The normal size of the die may be fixed desired by adjusting nuts 14 and 15, as will be readily understood. 7

The form shown in Fig. 1

is designed for cutting right-hand threads.

If it is desired to change the head for cutting left-hand done by substitub occupies the same relative position on the:

, as shownfor the ri ht-hand construction in l ig. 1.

swing thus fully described my said inopposite sideof bracket A on the body A.

12 with its point'adapted.

the die rigid in A jam nut 17 is mounted as desired.

vention, what I claim as new and desire to secure by Letters Patent, is 'In' a die-head designed for manual openingend Closing the combination of a body. outterrholders mounted to oscillate in said body,-*and -means for opening and closing the die byhand comprising a ring mounted to rotate on said body and connected to said cutter-ho1ders, a toggle lever fulorumed on said, body and having a screw-threaded part extending through a pivoted block mounted on said ring, nuts on said screw-threaded part for adjusting the length of the connection and regulating the size of the die, and

a stop 'adjustably mounted in a perforation 15 in said lever and adapted to strike on a part of said body and limit the break of said toggle in an inward direction, substantially as set forth.

In witness whereof, I, have my hand and sea] at Waynesboro, Pennsyl-- Vania, this 27th day of February, A. D. nineteen hundred and eleven. I

HENRY L; FISHER. as

Witnesses:

CHAS. B. CLAYTON, E. W. BEARD.

hereunto set 20 

